
class TreeNode{
    public int val;
    public TreeNode left;
    public TreeNode right;

    public TreeNode(int val) {
        this.val = val;
    }

    public TreeNode() {
    }
}

public class Test {
    public static void main(String[] args) {
        TreeNode node = new TreeNode(10);
        System.out.println(node.val);
    }
}
